Kouichi Hirose

An ally and classmate who meets Jousuke when Joutarou is searching for him, resulting in the two becoming quick friends.

His misadventures with Jousuke eventually cause him to take a hit from the Bow and Arrow and develop a Stand, Echoes, which evolves and gains various sound-related abilities over the course of the story.

Echo's abilities:
- Act 1. Enables him to write on any surface, causing the words or onomatopoeia to continuously repeat at various volumes.
- Act 2. Enables him to write a sound effect on any surface. If the word is touched, a special effect related to the sound effect is activated.
- Act 3. A humanoid Stand, facilitates conventional melee attack and the ability to "freeze" targets by ascribing them unbearable weight.